The 643X2 from Sioux Chief is a 1/2” PEX x 1/2” Copper Fitting Adapter, Lead Free.  Adapters are used to extend runs, or to simply change the connection type at the end of a pipe. This allows dissimilar pipes to be connected, without the need for a more involved setup. This fitting connects PEX tubing to copper in a straight line. 

PEX x Copper Fitting Adapter is used to transition between PEX tubing and copper fittings. When making a connection, always solder the sweat part of the fitting first, cool it off and then connect the PEX side.

This crimp style PEX fitting can be installed using the following connection systems : Crimp Connection System (Copper Crimp Rings PEX Crimp Tool) Clamp (Cinch) Connection System (Stainless Steel PEX Clamps PEX Clamp Tool) Manufactured to ASTM F1807.

The ASTM F1807 Crimp™ is the oldest and most popular PEX connection system. Since 1996 it has provided hundreds of millions of leak-free, permanent joints. From residential to commercial installations, F1807 connections have provided an easy and reliable plumbing connection and have stood the test of time.

 • Approved for potable water use
 • One-piece solid copper
 • Allows to transition between 3/4 inch copper pipe and 3/4 inch PEX tubing
 • Straight Adapter
 • Lead-Free, Nominal Size A: 1/2 inch, Nominal Size B: 1/2 inch,
 • PEX Barb x Male Sweat Connection
 • Copper
 • Standards: ASTM F1807, CSA B137.5-97

Brochure:
https://www.siouxchief.com/products/supply/powerpex-systems/astm-f1807/adapters-connectors/straight/male-sweat/copper?template=P3Brochures

Installation Guide:
https://www.siouxchief.com/docs/default-source/technical-documents/installations/supply/pex-systems---powerpex---installation-guide.pdf?sfvrsn=58ef3637_384

About SIOUX CHIEF:
Sioux Chief offers all major PEX systems. Sioux Chief’s PEX offering is the most complete in the plumbing industry. All fitting and tubing solutions carry a 25-year warranty, mixed or matched. Sioux Chief does not limit its warranty on tube or fittings based on matching system connections. This is unique.

PowerPEX is warranted across all three of Sioux Chief’s PEX system connection offerings, giving contractors the ability to choose the right tube or fitting connection for each application, layout or contractor comfort level. We call this Fitting Freedom™.

Sioux Chief believes intelligent systems may incorporate hybrid PEX offerings to maximize each connection system’s benefit. This Power to Choose™ puts the plumber back at the heart of smart plumbing.

Documentation:
For complete product instructions specifications and how-to installation please visit: https://www.siouxchief.com/products/supply/powerpex-systems/astm-f1807/adapters-connectors/straight/male-sweat/copper